Can I apply PL4 lens corrections when I use a "known" lens on a film camera

It is still available AI Image Resizer & Photo Enlargement Software - ON1

Well, the current version is €73,07

Back then (2004) I used Photoshop CS3.

If I need stitching nowadays, I use Affinity Photo. Here’s a 22 shot stitch taken with a Nikon D200 on a Manfrotto panoramic head

That’s a 97Mpx image without resizing. Here’s a screenshot of a detail at 100%